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Update __set_cr27() to mark r31 clobbered.

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The function __set_cr27() uses the `ble`
instruction without marking the link register
r31 as clobbered. This change adds r31 to the
list of clobbers. The TLS thread register is
cr27 and is set by calling __set_cr27().
This commit is contained in:
Carlos O'Donell 2010-02-02 16:40:28 -05:00
parent 40215fde03
commit d143075adc
2 changed files with 9 additions and 2 deletions
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5
ChangeLog.hppa
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@ -1,3 +1,8 @@
2010-02-02 Carlos O'Donell <carlos@codesourcery.com>
* sysdeps/hppa/nptl/tls.h (__set_cr27): Clobber
link register r31.
2010-02-02 Carlos O'Donell <carlos@codesourcery.com>
* sysdeps/unix/sysv/linux/hppa/makecontext.c (__makecontext):

6
sysdeps/hppa/nptl/tls.h
View File

@ -1,5 +1,5 @@
/* Definition for thread-local data handling. NPTL/hppa version.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Copyright (C) 2005, 2007, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -140,11 +140,13 @@ static inline struct pthread *__get_cr27(void)
return (struct pthread *) cr27;
}
/* We write to cr27, clobber r26 as the input argument, and clobber
r31 as the link register. */
static inline void __set_cr27(struct pthread *cr27)
{
asm ( "ble 0xe0(%%sr2, %%r0)\n\t"
"copy %0, %%r26"
: : "r" (cr27) : "r26" );
: : "r" (cr27) : "r26", "r31" );
}
/* Get and set the global scope generation counter in struct pthread. */